/*
 *  Copyright 2008 The Apache Software Foundation
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

package org.mybatis.generator.internal;

import java.util.Date;
import java.util.List;
import java.util.Properties;

import org.mybatis.generator.api.CommentGenerator;
import org.mybatis.generator.api.IntrospectedColumn;
import org.mybatis.generator.api.IntrospectedTable;
import org.mybatis.generator.api.dom.java.CompilationUnit;
import org.mybatis.generator.api.dom.java.Field;
import org.mybatis.generator.api.dom.java.FullyQualifiedJavaType;
import org.mybatis.generator.api.dom.java.InnerClass;
import org.mybatis.generator.api.dom.java.InnerEnum;
import org.mybatis.generator.api.dom.java.JavaElement;
import org.mybatis.generator.api.dom.java.Method;
import org.mybatis.generator.api.dom.java.Parameter;
import org.mybatis.generator.api.dom.xml.TextElement;
import org.mybatis.generator.api.dom.xml.XmlElement;
import org.mybatis.generator.config.MergeConstants;
import org.mybatis.generator.config.PropertyRegistry;

import static org.mybatis.generator.internal.util.StringUtility.isTrue;

/**
 * @author Jeff Butler
 * 
 */
public class DefaultCommentGenerator implements CommentGenerator {

    private final Properties properties;
    private boolean suppressDate;
    private boolean suppressAllComments;

    public DefaultCommentGenerator() {
        super();
        properties = new Properties();
        suppressDate = false;
        suppressAllComments = false;
    }

    public void addJavaFileComment(CompilationUnit compilationUnit) {
        // add no file level comments by default
    }

    /**
     * Adds a suitable comment to warn users that the element was generated, and
     * when it was generated.
     */
    public void addComment(XmlElement xmlElement) {
        if (suppressAllComments) {
            return;
        }

        xmlElement.addElement(new TextElement("<!--")); //$NON-NLS-1$

        StringBuilder sb = new StringBuilder();
        sb.append("  WARNING - "); //$NON-NLS-1$
        sb.append(MergeConstants.NEW_ELEMENT_TAG);
        xmlElement.addElement(new TextElement(sb.toString()));
        xmlElement
                .addElement(new TextElement(
                        "  This element is automatically generated by MyBatis Generator, do not modify.")); //$NON-NLS-1$

        String s = getDateString();
        if (s != null) {
            sb.setLength(0);
            sb.append("  This element was generated on "); //$NON-NLS-1$
            sb.append(s);
            sb.append('.');
            xmlElement.addElement(new TextElement(sb.toString()));
        }

        xmlElement.addElement(new TextElement("-->")); //$NON-NLS-1$
    }

    public void addRootComment(XmlElement rootElement) {
        // add no document level comments by default
    }

    public void addConfigurationProperties(Properties properties) {
        this.properties.putAll(properties);

        suppressDate = isTrue(properties
                .getProperty(PropertyRegistry.COMMENT_GENERATOR_SUPPRESS_DATE));
        
        suppressAllComments = isTrue(properties
                .getProperty(PropertyRegistry.COMMENT_GENERATOR_SUPPRESS_ALL_COMMENTS));
    }

    /**
     * This method adds the custom javadoc tag for. You may do nothing if you do
     * not wish to include the Javadoc tag - however, if you do not include the
     * Javadoc tag then the Java merge capability of the eclipse plugin will
     * break.
     * 
     * @param javaElement
     *            the java element
     */
    protected void addJavadocTag(JavaElement javaElement,
            boolean markAsDoNotDelete) {
        javaElement.addJavaDocLine(" *"); //$NON-NLS-1$
        StringBuilder sb = new StringBuilder();
        sb.append(" * "); //$NON-NLS-1$
        sb.append(MergeConstants.NEW_ELEMENT_TAG);
        if (markAsDoNotDelete) {
            sb.append(" do_not_delete_during_merge"); //$NON-NLS-1$
        }
        String s = getDateString();
        if (s != null) {
            sb.append(' ');
            sb.append(s);
        }
        javaElement.addJavaDocLine(sb.toString());
    }

    /**
     * This method returns a formated date string to include in the Javadoc tag
     * and XML comments. You may return null if you do not want the date in
     * these documentation elements.
     * 
     * @return a string representing the current timestamp, or null
     */
    protected String getDateString() {
        if (suppressDate) {
            return null;
        } else {
            return new Date().toString();
        }
    }

    public void addClassComment(InnerClass innerClass,
            IntrospectedTable introspectedTable) {
        if (suppressAllComments) {
            return;
        }
        
        StringBuilder sb = new StringBuilder();
        System.out.println("innerClass.getClass().getName() = " + innerClass.getType());

       String shortName =  innerClass.getType().getShortName();

        innerClass.addJavaDocLine("/**"); //$NON-NLS-1$
        //        innerClass.addJavaDocLine(" * This class was generated by MyBatis Generator."); //$NON-NLS-1$

        if("GeneratedCriteria".equals(shortName)){
            sb.append(" * 基本动态SQL对象,");
        } else if ("Criterion".equals(shortName)){
            sb.append(" * 动态SQL对象,");
        }

        //$NON-NLS-1$
        sb.append(introspectedTable.getFullyQualifiedTable());
        innerClass.addJavaDocLine(sb.toString());

//        addJavadocTag(innerClass, false);

        innerClass.addJavaDocLine(" */"); //$NON-NLS-1$
    }

    public void addEnumComment(InnerEnum innerEnum,
            IntrospectedTable introspectedTable) {
        if (suppressAllComments) {
            return;
        }

        StringBuilder sb = new StringBuilder();

        innerEnum.addJavaDocLine("/**"); //$NON-NLS-1$
        //        innerEnum.addJavaDocLine(" * This enum was generated by MyBatis Generator."); //$NON-NLS-1$

        sb.append(" * This enum corresponds to the database table "); //$NON-NLS-1$
        sb.append(introspectedTable.getFullyQualifiedTable());
        innerEnum.addJavaDocLine(sb.toString());

//        addJavadocTag(innerEnum, false);

        innerEnum.addJavaDocLine(" */"); //$NON-NLS-1$
    }

    public void addFieldComment(Field field,
            IntrospectedTable introspectedTable,
            IntrospectedColumn introspectedColumn) {
        if (suppressAllComments) {
            return;
        }

        StringBuilder sb = new StringBuilder();

        field.addJavaDocLine("/**"); //$NON-NLS-1$
//        field.addJavaDocLine(" * This field was generated by MyBatis Generator."); //$NON-NLS-1$

        sb.append(" *  "); //$NON-NLS-1$
        sb.append(introspectedColumn.getRemarks());
        sb.append(",所属表字段为");
        sb.append(introspectedTable.getFullyQualifiedTable());
        sb.append('.');
        sb.append(introspectedColumn.getActualColumnName());
        field.addJavaDocLine(sb.toString());

//        addJavadocTag(field, false);

        field.addJavaDocLine(" */"); //$NON-NLS-1$
    }

    public void addFieldComment(Field field, IntrospectedTable introspectedTable) {
        if (suppressAllComments) {
            return;
        }


        StringBuilder sb = new StringBuilder();

        field.addJavaDocLine("/**"); //$NON-NLS-1$
//        field.addJavaDocLine(" * This field was generated by MyBatis Generator."); //$NON-NLS-1$
        String field_name = field.getName();
        sb.append(" * ");
        if("orderByClause".equals(field_name)){
            sb.append("排序字段");
        } else if("distinct".equals(field_name)){
            sb.append("是否过滤重复数据");
        } else if( field_name.endsWith(introspectedTable.getExampleType())){
            sb.append("当前排序条件实例");
        } else if("serialVersionUID".equals(field_name)){
            sb.append("序列化ID");
        }
        sb.append(",");
        sb.append(introspectedTable.getFullyQualifiedTable());
        field.addJavaDocLine(sb.toString());

//        addJavadocTag(field, false);

        field.addJavaDocLine(" */"); //$NON-NLS-1$
    }

    public void addGeneralMethodComment(Method method,
            IntrospectedTable introspectedTable) {
        if (suppressAllComments) {
            return;
        }

        StringBuilder sb = new StringBuilder();

        method.addJavaDocLine("/**"); //$NON-NLS-1$
//        method.addJavaDocLine(" * This method was generated by MyBatis Generator."); //$NON-NLS-1$

//        sb.append(" * This method corresponds to the database table "); //$NON-NLS-1$
        sb.append(" * ");
        if (method.isConstructor()) {
            sb.append(" 构造查询条件");
        }
        String method_name = method.getName();
        if ("setOrderByClause".equals(method_name)) {
            sb.append(" 设置排序字段");
        } else if ("setDistinct".equals(method_name)) {
            sb.append(" 设置过滤重复数据");
        } else if ("getOredCriteria".equals(method_name)) {
            sb.append(" 获取当前的查询条件实例");
        } else if ("isDistinct".equals(method_name)) {
            sb.append(" 是否过滤重复数据");
        } else if ("getOrderByClause".equals(method_name)) {
            sb.append(" 获取排序字段");
        } else if ("createCriteria".equals(method_name)) {
            sb.append(" 创建一个查询条件");
        } else if ("createCriteriaInternal".equals(method_name)) {
            sb.append(" 内部构建查询条件对象");
        } else if ("clear".equals(method_name)) {
            sb.append(" 清除查询条件");
        } else if ("countByExample".equals(method_name)) {
            sb.append(" 根据指定的条件获取数据库记录数");
        } else if ("deleteByExample".equals(method_name)) {
            sb.append(" 根据指定的条件删除数据库符合条件的记录");
        } else if ("deleteByPrimaryKey".equals(method_name)) {
            sb.append(" 根据主键删除数据库的记录");
        } else if ("insert".equals(method_name)) {
            sb.append(" 新写入数据库记录");
        } else if ("insertSelective".equals(method_name)) {
            sb.append(" 动态字段,写入数据库记录");
        } else if ("selectByExample".equals(method_name)) {
            sb.append(" 根据指定的条件查询符合条件的数据库记录");
        } else if ("selectByPrimaryKey".equals(method_name)) {
            sb.append(" 根据指定主键获取一条数据库记录");
        } else if ("updateByExampleSelective".equals(method_name)) {
            sb.append(" 动态根据指定的条件来更新符合条件的数据库记录");
        } else if ("updateByExample".equals(method_name)) {
            sb.append(" 根据指定的条件来更新符合条件的数据库记录");
        } else if ("updateByPrimaryKeySelective".equals(method_name)) {
            sb.append(" 动态字段,根据主键来更新符合条件的数据库记录");
        } else if ("updateByPrimaryKey".equals(method_name)) {
            sb.append(" 根据主键来更新符合条件的数据库记录");
        }
        sb.append(",");
        sb.append(introspectedTable.getFullyQualifiedTable());
        method.addJavaDocLine(sb.toString());

        final List<Parameter> parameterList = method.getParameters();
        if (!parameterList.isEmpty()) {
            method.addJavaDocLine(" *");
            if ("or".equals(method_name)) {
                sb.append(" 增加或者的查询条件,用于构建或者查询");
            }
        } else {
            if ("or".equals(method_name)) {
                sb.append(" 创建一个新的或者查询条件");
            }
        }
        String paramterName;
        for (Parameter parameter : parameterList) {
            sb.setLength(0);
            sb.append(" * @param "); //$NON-NLS-1$
            paramterName = parameter.getName();
            sb.append(paramterName);
            if ("orderByClause".equals(paramterName)) {
                sb.append(" 排序字段"); //$NON-NLS-1$
            } else if ("distinct".equals(paramterName)) {
                sb.append(" 是否过滤重复数据");
            } else if ("criteria".equals(paramterName)) {
                sb.append(" 过滤条件实例");
            }
            method.addJavaDocLine(sb.toString());
        }


        //        addJavadocTag(method, false);

        method.addJavaDocLine(" */"); //$NON-NLS-1$
    }

    public void addGetterComment(Method method,
            IntrospectedTable introspectedTable,
            IntrospectedColumn introspectedColumn) {
        if (suppressAllComments) {
            return;
        }

        StringBuilder sb = new StringBuilder();

        method.addJavaDocLine("/**"); //$NON-NLS-1$
//        method.addJavaDocLine(" * This method was generated by MyBatis Generator."); //$NON-NLS-1$

        sb.append(" * 获取 "); //$NON-NLS-1$
        sb.append(introspectedColumn.getRemarks()).append(" 字段:");
        sb.append(introspectedTable.getFullyQualifiedTable());
        sb.append('.');
        sb.append(introspectedColumn.getActualColumnName());
        method.addJavaDocLine(sb.toString());

        method.addJavaDocLine(" *"); //$NON-NLS-1$

        sb.setLength(0);
        sb.append(" * @return "); //$NON-NLS-1$
        sb.append(introspectedTable.getFullyQualifiedTable());
        sb.append('.');
        sb.append(introspectedColumn.getActualColumnName());
        sb.append(", ");
        sb.append(introspectedColumn.getRemarks());
        method.addJavaDocLine(sb.toString());

//        addJavadocTag(method, false);

        method.addJavaDocLine(" */"); //$NON-NLS-1$
    }

    public void addSetterComment(Method method,
            IntrospectedTable introspectedTable,
            IntrospectedColumn introspectedColumn) {
        if (suppressAllComments) {
            return;
        }

        StringBuilder sb = new StringBuilder();

        method.addJavaDocLine("/**"); //$NON-NLS-1$
//        method.addJavaDocLine(" * This method was generated by MyBatis Generator."); //$NON-NLS-1$

        sb.append(" * 设置 ");  //$NON-NLS-1$
        sb.append(introspectedColumn.getRemarks()).append(" 字段:");
        sb.append(introspectedTable.getFullyQualifiedTable());
        sb.append('.');
        sb.append(introspectedColumn.getActualColumnName());
        method.addJavaDocLine(sb.toString());

        method.addJavaDocLine(" *"); //$NON-NLS-1$

        Parameter parm = method.getParameters().get(0);
        sb.setLength(0);
        sb.append(" * @param "); //$NON-NLS-1$
        sb.append(parm.getName());
        sb.append(" "); //$NON-NLS-1$
        sb.append(introspectedTable.getFullyQualifiedTable());
        sb.append('.');
        sb.append(introspectedColumn.getActualColumnName());
        sb.append(", ");
        sb.append(introspectedColumn.getRemarks());
        method.addJavaDocLine(sb.toString());

//        addJavadocTag(method, false);

        method.addJavaDocLine(" */"); //$NON-NLS-1$
    }

    public void addClassComment(InnerClass innerClass,
            IntrospectedTable introspectedTable, boolean markAsDoNotDelete) {
        if (suppressAllComments) {
            return;
        }

        StringBuilder sb = new StringBuilder();

        innerClass.addJavaDocLine("/**"); //$NON-NLS-1$
//        innerClass.addJavaDocLine(" * This class was generated by MyBatis Generator."); //$NON-NLS-1$
        System.out.println("innerClass.getType().getShortName() = " + innerClass.getType().getShortName());
        sb.append(" * 数据库表 "); //$NON-NLS-1$
        sb.append(introspectedTable.getFullyQualifiedTable());
        sb.append("映射实体");
        innerClass.addJavaDocLine(sb.toString());

//        addJavadocTag(innerClass, markAsDoNotDelete);

        innerClass.addJavaDocLine(" */"); //$NON-NLS-1$
    }
}
